CN1859811B - Passive optical network system and its service protective method - Google Patents
Passive optical network system and its service protective method Download PDFInfo
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- CN1859811B CN1859811B CN2006100343100A CN200610034310A CN1859811B CN 1859811 B CN1859811 B CN 1859811B CN 2006100343100 A CN2006100343100 A CN 2006100343100A CN 200610034310 A CN200610034310 A CN 200610034310A CN 1859811 B CN1859811 B CN 1859811B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q11/0067—Provisions for optical access or distribution networks, e.g. Gigabit Ethernet Passive Optical Network (GE-PON), ATM-based Passive Optical Network (A-PON), PON-Ring
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/02—Details
- H04J3/14—Monitoring arrangements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04J—MULTIPLEX COMMUNICATION
- H04J3/00—Time-division multiplex systems
- H04J3/16—Time-division multiplex systems in which the time allocation to individual channels within a transmission cycle is variable, e.g. to accommodate varying complexity of signals, to vary number of channels transmitted
- H04J3/1694—Allocation of channels in TDM/TDMA networks, e.g. distributed multiplexers
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04Q—SELECTING
- H04Q11/00—Selecting arrangements for multiplex systems
- H04Q11/0001—Selecting arrangements for multiplex systems using optical switching
- H04Q11/0062—Network aspects
- H04Q2011/0079—Operation or maintenance aspects
- H04Q2011/0081—Fault tolerance; Redundancy; Recovery; Reconfigurability
Abstract
The present invention discloses passive optical network system and service protection method used for realizing service recovering and fault location in passive optical network gone wrong. Said passive optical network system includes optical line terminal, optical distributing network, and optical network terminal unit protection group, said optical network terminal unit protection group including at least two optical network terminal units, each optical network terminal unit connected with at least one other optical network terminal unit in protection group and consisting of backing up protection relation. The present invention does not need increasing superfluous backing up equipment and link.
Description
Technical field
The present invention relates to field of optical networks, relate to a kind of passive optical network and service protecting method thereof specifically.
Background technology
(Passive Optical Network is to refer to an access in user's the optical fiber distributing net PON) to EPON, and mid portion does not contain any active electronic equipment, all converges up and broadcast downstream by what passive devices such as optical branching device were realized subscriber signal.Passive optical network technique is a kind of broadband access technology that has competition potential, is the important technical that realizes that user's " last kilometer " inserts.(Optical Distribution Network has adopted Passive Optical Components in ODN), as transmission medium, has characteristics such as bandwidth height, anti-electromagnetic interference capability is strong, loss is low, cost is little, and is simple in structure with optical fiber at Optical Distribution Network for it.In recent years, various PON technology have progressed into large-scale commercial stage.
As shown in Figure 1, passive optical network has mainly adopted tree topology in the prior art.Wherein, user's business is respectively by optical network unit (Optical Network Unit, ONU) or Optical Network Terminal (Optical Network Terminal, ONT) insert, on Optical Distribution Network ODN, converge then, be sent at last optical line terminal (Optical Line Terminal, OLT).But; in this single tree topology; because this tree is to the measure of various fault unprotects and recovery; the means that also lack fault location, in this case, if equipment or link occurs fault; and can not get for a long time recovering; user's business will be received and seriously influence, and brings serious safety problem, also is unusual difficulty to failure location simultaneously.So the fail safe of EPON must provide service protection function in the passive optical network with regard to becoming a problem that must come into one's own under the situation that network breaks down.
In the prior art, can provide service protection by full guard optical fiber switchover mode in the passive optical network, as shown in Figure 2.Wherein, all have two links to link to each other between OLT and the ODN and between ONU and each ONU/ONT, wherein a link can guarantee can make when breaking down business to be able to rapid recovery as redundancy backup in this way.
But the error protection measure of the prior art is by increasing the unimpeded and professional normal operation that a large amount of redundance units guarantees network, some shortcomings below existing:
1. construction cost height.Need the duplicate transmission equipment of two covers, and each ONU needs to increase an optical interface, will increase the ONU cost greatly.
2. bandwidth availability ratio is low.Article two, active channel has only one in work, and other one is in idle condition all the time, has caused a large amount of wastings of resources.
3. can't fault location and point out fault type.
Summary of the invention
The technical problem that the present invention solves is to propose a kind of passive optical network and service protecting method thereof; can provide service protection and failure diagnosis when being implemented in EPON generation link failure or equipment fault; reducing the construction costs, improve bandwidth availability ratio.
For addressing the above problem, the present invention proposes a kind of passive optical network, comprising:
Optical line terminal links to each other with Optical Distribution Network, is used for the process user business datum and to the management and the control of Optical Distribution Network and optical network terminal group;
Optical Distribution Network links to each other with equipment in the optical network terminal group with optical line terminal, is used for the user service data from the optical network terminal group of received is converged and send to optical line terminal;
Also comprise:
Optical network terminal protection group links to each other with Optical Distribution Network, is used to realize the service protection of optical network terminal in the protection group, and the user service data that receives is sent to Optical Distribution Network.
Wherein, described optical network terminal protection group comprises at least two optical network terminals, each optical network terminal all organize with protection that interior other optical network terminals link to each other and with its composition relation of giving mutual protection.
Wherein, in the described optical network terminal protection group during the first optical network terminal fault, optical line terminal is the first optical network terminal signalling trouble in the group that is protected, second optical network terminal is born backup forwarding work in the notice protection group, the bandwidth parameter of distributing to first optical network terminal is added on the bandwidth parameter of second optical network terminal itself, make first forwarding of optical network terminal data on second optical network terminal can not influence the business of second optical network device itself; Perhaps second optical network terminal is given the logical channel on EPON of first optical network terminal distribution separately, and report optical line terminal, the optical line terminal bandwidth parameter indirect assignment that first optical network terminal is original is given the logical channel of this backup usefulness, and the data of first optical network terminal and second optical network terminal and bandwidth parameter can not interacted.
Wherein, described optical network terminal comprises:
The service port handover module; link to each other by optical fiber link with Optical Distribution Network; interconnect by backup link with the service port handover module of forming the opposite end optical network terminal of the relation of giving mutual protection with this equipment in the protection group, be used for when the time business with the user and switch on the backup link and send with link occurs fault that Optical Distribution Network links to each other.
Wherein, described service port handover module comprises:
The light distributor, link to each other with the Service Processing Module of this equipment is inner, link to each other by optical fiber link with Optical Distribution Network, with link to each other by backup link with the light distributor of service port handover module that this equipment is formed the opposite end optical network terminal of protection relation in the protection group, be used for and will send to two other interface from the distribution of services of any one interface reception;
Diverter switch; the light distributor and and this equipment form between the light distributor of service port handover module of opposite end optical network terminal of protection relation; when detecting this equipment, optical network terminal detects the opposite end optical network terminal during of forming the protection relation with this equipment to optical line terminal link failure or optical line terminal to the optical line terminal link failure; switch closure; otherwise, switch opens.
Wherein, described backup link is an optical fiber link.
As an alternative embodiment of the invention, wherein said service port handover module comprises:
Protocol conversion module links to each other with Optical Distribution Network with Ethernet switch, is used to carry out the conversion of passive optical network protocol and Ethernet protocol;
Ethernet switch; with this equipment user's Service Processing Module; protocol conversion module is inner to link to each other; with link to each other by backup link with the corresponding port of Ethernet switch of service port handover module that this equipment is formed the opposite end optical network terminal of protection relation in the protection group; link just often when between this passive light network terminal and Optical Distribution Network; interface that links to each other with the customer service processing module and the interface conducting that links to each other with protocol conversion module; otherwise, the interface that links to each other with the customer service processing module with the protection group in form the interface conducting that the corresponding port of Ethernet switch of service port handover module of the opposite end optical network terminal of protection relation links to each other with this equipment.
Wherein, described backup link is an ethernet link.
For addressing the above problem, the invention allows for a kind of service protecting method of passive optical network, comprise step:
A) determine optical network terminal protection group, described optical network terminal protection group comprises at least two optical network terminals, each optical network terminal all organize with protection that interior other optical network terminals link to each other by backup link and with its composition relation of giving mutual protection;
B) after optical line terminal detects the optical network terminal fault, to forming the optical network terminal transmission failure notification message that protection concerns with this optical network terminal that breaks down;
C) optical network terminal with the optical network terminal composition protection relation that breaks down receives described failure notification message, bears the business of the optical line terminal equipment that breaks down.
Wherein, optical line terminal adds the bandwidth parameter of distributing to the optical network terminal that breaks down with the optical network terminal that breaks down to be formed on the bandwidth parameter of optical network terminal of protection relation itself, makes the optical network terminal data that break down can not influence the business of forming the optical network device itself that protection concerns with the optical network terminal that breaks down forming forwarding on the optical network terminal of protection relation with the optical network terminal that breaks down; Perhaps, with the independent logical channel of giving on the EPON of optical network terminal distribution that breaks down of the optical network terminal of the optical network terminal composition protection relation that breaks down, and report optical line terminal, optical line terminal bandwidth parameter indirect assignment that the optical network terminal that breaks down is original is given the logical channel of this backup usefulness, makes the optical network terminal that breaks down and can not interact with data and bandwidth parameter that the optical network terminal that breaks down is formed the optical network terminal of protection relation;
Wherein, step c) comprises step:
C1) optical network terminal with the optical network terminal composition protection relation that breaks down receives described failure notification message, judge whether also to receive the professional solicited message of transmitting of bearing that the Optical Network Terminal that breaks down sends, if, the optical network terminal that answer is broken down agrees to bear professional the forwarding, and execution in step c2), otherwise, execution in step c3);
C2) form the business that the optical network terminal of protecting relation is born the optical line terminal equipment that breaks down with the optical network terminal that breaks down;
C3) optical network terminal with the optical network terminal composition protection relation that breaks down carries out failure diagnosis by backup link to the Optical Network Terminal that breaks down.
Wherein, step c2) comprise step:
C21) form interface and the uplink service interface conducting that the optical network terminal of protection relation will be connected with backup link with the optical network terminal that breaks down;
C22) optical network terminal that breaks down receives the return information of protecting the optical network terminal of relation to send with this optical network terminal that breaks down composition, interface that will be connected with the customer service processing module and the interface conducting that is connected with backup link.
Wherein, step c3) specifically is meant and optical network terminal that the optical network terminal that breaks down is formed the protection relation detects the state of backup link; if state is normal; the fault of judging this optical network terminal is system's operation troubles; otherwise the fault of judging this optical network terminal is power down fault or backup link fault.
Wherein, described backup link is optical fiber link or ethernet link.
Compared with prior art, the present invention has the following advantages:
1. the present invention only need increase backup link between equipment, does not need to increase redundant equipment, has saved construction cost when improving internet security greatly;
2. the present invention has just increased the backup link that is connected between the equipment, and not needing increases redundant service channel, has avoided the waste of resource, has improved bandwidth availability ratio;
3. the present invention can also provide diagnostic means for the link failure and the equipment fault of EPON.
Description of drawings
Fig. 1 is the topology diagram of tree type EPON;
Fig. 2 is a prior art EPON full guard optical fiber switchover mode networking schematic diagram;
Fig. 3 is a passive optical network networking schematic diagram of the present invention;
Fig. 4 is that passive optical network service of the present invention is protected tactful schematic diagram;
Fig. 5 is the service port handover module structure chart when backup link is optical fiber link between the ONU among the present invention;
Fig. 6 is the service port handover module structure chart when backup link is ethernet link between the ONU among the present invention.
Embodiment
With reference to the accompanying drawings the preferred embodiments of the present invention are made detailed explanation below.
Fig. 3 is a passive optical network networking schematic diagram of the present invention, wherein, optical network terminal ONU/ONT is linked to each other with Optical Distribution Network equipment ODN by optical fiber, Optical Distribution Network equipment ODN is linked to each other with optical line terminal equipment OLT by optical fiber, user's business datum is inserted by ONU/ONT, on ODN, converge, be sent to OLT then and be for further processing; The equipment that needs protection among the optical network terminal ONU/ONT is divided into the protection group, and the equipment in the protection group links to each other mutually by backup link.In the present embodiment, two equipment are divided in a protection group, and two equipment in the protection group are connected to each other by backup link, and they form the protection relation mutually, and simultaneously, the information of this protection group is recorded among the optical line terminal equipment OLT.
The following describes this device of the present invention and under the situation that EPON breaks down, how to realize service protection and fault location.
As shown in Figure 4, when fault-free at ordinary times, regularly inquire about the other side's state by backup link between ONU1 and the ONU2, and regularly state is reported OLT;
When ONU1 when the disconnected PON interface module fine or that connect ONU1 and ODN of the optical fiber of ODN breaks down, ONU1 self detects the interruption that is connected with OL, start recovery mechanism, and inform that by the timing inquiry mechanism ONU2 self breaks down, need ONU2 to bear backup forwarding work; Simultaneously, OLT also can detect with ONU1 and get in touch interruption, and notice ONU2 bears data forwarding work as the backup partner; ONU2 replys to ONU1 after obtaining the notice of OLT, agrees to bear the work of ONU1 forwarding of data; Like this, ONU1 sends to ONU2 with business datum by backup link, and ONU2 sends to ODN with the business datum of ONU1, thereby realizes the recovery of ONU1 business.
When ONU1 generation disconnection fault, when the backup link interruption or the system failure, OLT detects ONU1 and goes offline, and notifies ONU2 by backup link ONU1 to be carried out failure diagnosis at once.Whether ONU2 at first detects the backup link state normal, if the backup link state is undesired, then failure cause is that ONU1 power down or backup link interrupt; If the backup link state is normal, but ONU2 can't receive the timing query message of ONU1, and then failure cause is the ONU1 system failure, needs artificial diagnosis and eliminating.
Wherein, the realization that realizes service protection as ONU1 when the fiber break of ODN or the PON interface module that connects ONU1 and ODN break down has different specific implementation methods according to backup link different:
When backup link is optical fiber:
At this moment, a kind of service port handover module of the inner employing of ONU, as shown in Figure 5.Represent with including leg-of-mutton annulus among the figure, claim the light distributor temporarily.Wherein, the light dispensing utensil has following function: all can go out from two other interface from the light signal that three interface A/B/C enter, except luminous power has the decay slightly, light signal inhibit signal in the effective wavelength window is undistorted.This module can be used as a whole optical device, and also available three 1:2 optical splitters constitute.When three 1:2 optical splitters when as above the figure Triangle in Circle interconnects in twos, the light signal 1 that enters from the A interface is divided into 2, can go out from two interfaces of B, C, can go out from two interfaces of A, C equally, can go out from two interfaces of A, B equally from the light signal that C interface enters from the light signal that B interface enters.
This module also comprises an optical switch K1/K2, and the function of described optical switch is cut-offfing according to the signal of telecommunication control light path that applies.
When the branch road optical fiber M1 that links to each other with OLT as ONU1 interrupted, ONU1 detected interruptions that be connected with OLT, the startup recovery mechanism; ONU1 closes optical switch K1, and the light signal that optical module sends just sends to ONU2 from backup optical fiber N.
After OLT detected ONU1 and goes offline, finding the backup partner of ONU1 in the self information storehouse was ONU2, will notify ONU2 to start recovery mechanism; After ONU2 receives the notice of OLT, self optical switch K2 is closed.
After ONU1 and ONU2 closed self optical switch K1 and K2, ONU1 just can land the PON network by the optical fiber M2 of ONU2 again, recovers its business.
As seen from Figure 5, this moment, ONU1 and ONU2 can regard two PON terminals that are connected under the 1:2 optical splitter as, and ONU1 is to the physical link of OLT and basic identical originally, and ONU1 and ONU2 need not do other any work for fault recovery.
When backup link is ethernet link:
At this moment, inner another the service port handover module that adopts of ONU, as shown in Figure 6.
This module comprises protocol conversion module and Ethernet switch.Wherein protocol conversion module is used to realize the conversion of passive optical network protocol and Ethernet protocol between Ethernet switch and optical network interface; Ethernet switch links to each other with customer service processing module, protocol conversion module and backup Ethernet interface, be used for by dividing VLAN (Virtual Local AreaNetwork, VLAN) conducting between realization customer service processing module and protocol conversion module, customer service processing module and the backup Ethernet interface.
When ONU1 arrived the branch road optical fiber M1 interruption of ODN, ONU1 self detected the interruption that is connected with OLT, starts recovery mechanism, informs that by the timing inquiry mechanism ONU2 self breaks down, and needed ONU2 to bear backup forwarding work; At this moment OLT also detects ONU1 and goes offline, and notice ONU2 bears data forwarding work as the backup partner; After ONU2 obtains the notice of OLT, reply to ONU1, agree to bear the work of ONU1 forwarding of data, on switch, pass through to divide VLAN with A port and the conducting of B port, set up the connection of backup Ethernet interface E2 to the PON up going port, realize the transmission of E2, and this connection situation is reported OLT to the data of PON up going port.
ONU1 receive ONU2 reply acceptance message after, the data flow that is up to the PON mouth is switched to backup Ethernet interface E1, promptly the mode by repartitioning VLAN switches to the B port from the A port of Ethernet switch.
OLT is obtaining the ONU1 signalling trouble, and after notifying ONU2 to bear backup forwarding work, the bandwidth parameter (generally comprising minimum bandwidth and maximum bandwidth etc.) of distributing to ONU1 is added on the bandwidth parameter of ONU2 itself, make the forwarding of ONU1 data on ONU2 can not influence the business of ONU2 itself.
Under the other implementation, ONU2 can be separately distributes logical channel on the PON network to ONU1, and reports OLT.The OLT bandwidth parameter indirect assignment that ONU1 is original is given the logical channel of this backup usefulness, and the data of ONU1 and ONU2 and bandwidth parameter just can not obscured like this, can not interact yet.
When ONU1 disconnection fault or self PON interface module take place broke down, above-mentioned various implementations all can make ONU2 on the basis that own service normally is provided, with the data forwarding of ONU1 to OLT, thereby recover the miscellaneous service of ONU1.
The above only is a preferred implementation of the present invention; should be pointed out that for those skilled in the art, under the prerequisite that does not break away from the principle of the invention; can also make some improvements and modifications, these improvements and modifications also should be considered as protection scope of the present invention.
Claims (11)
1. passive optical network comprises:
Optical line terminal links to each other with Optical Distribution Network, is used for the process user business datum and to the management and the control of Optical Distribution Network and optical network terminal group;
Optical Distribution Network links to each other with equipment in the optical network terminal protection group with optical line terminal, is used for the user service data from the optical network terminal group of received is converged and send to optical line terminal;
It is characterized in that, also comprise: optical network terminal protection group, link to each other with Optical Distribution Network, be used to realize the service protection of optical network terminal in the protection group, and the user service data that receives is sent to Optical Distribution Network; Described optical network terminal protection group comprises at least two optical network terminals, each optical network terminal all organize with protection that interior other optical network terminals link to each other and with its composition relation of giving mutual protection; Wherein, in the described optical network terminal protection group during the first optical network terminal fault, optical line terminal is the first optical network terminal signalling trouble in the group that is protected, second optical network terminal is born backup forwarding work in the notice protection group, the bandwidth parameter of distributing to first optical network terminal is added on the bandwidth parameter of second optical network terminal itself, make first forwarding of optical network terminal data on second optical network terminal can not influence the business of second optical network device itself; Perhaps second optical network terminal is given the logical channel on EPON of first optical network terminal distribution separately, and report optical line terminal, the optical line terminal bandwidth parameter indirect assignment that first optical network terminal is original is given the logical channel of this backup usefulness, and the data of first optical network terminal and second optical network terminal and bandwidth parameter can not interacted.
2. passive optical network as claimed in claim 1 is characterized in that, described optical network terminal comprises:
The service port handover module; link to each other by optical fiber link with Optical Distribution Network; interconnect by backup link with the service port handover module of forming the opposite end optical network terminal of the relation of giving mutual protection with this equipment in the protection group, be used for when the time business with the user and switch on the backup link and send with link occurs fault that Optical Distribution Network links to each other.
3. passive optical network as claimed in claim 2 is characterized in that, described service port handover module comprises:
The light distributor, link to each other with the Service Processing Module of this equipment is inner, link to each other by optical fiber link with Optical Distribution Network, with link to each other by backup link with the light distributor of service port handover module that this equipment is formed the opposite end optical network terminal of protection relation in the protection group, be used for and will send to two other interface from the distribution of services of any one interface reception;
Diverter switch; the light distributor and and this equipment form between the light distributor of service port handover module of opposite end optical network terminal of protection relation; when detecting this equipment, optical network terminal detects the opposite end optical network terminal during of forming the protection relation with this equipment to optical line terminal link failure or optical line terminal to the optical line terminal link failure; switch closure; otherwise, switch opens.
4. passive optical network as claimed in claim 2 is characterized in that, described service port handover module comprises:
Protocol conversion module links to each other with Optical Distribution Network with Ethernet switch, is used to carry out the conversion of passive optical network protocol and Ethernet protocol;
Ethernet switch; with this equipment user's Service Processing Module; protocol conversion module is inner to link to each other; with link to each other by backup link with the corresponding port of Ethernet switch of service port handover module that this equipment is formed the opposite end optical network terminal of protection relation in the protection group; link just often when between this passive light network terminal and Optical Distribution Network; interface that links to each other with the customer service processing module and the interface conducting that links to each other with protocol conversion module; otherwise, the interface that links to each other with the customer service processing module with the protection group in form the interface conducting that the corresponding port of Ethernet switch of service port handover module of the opposite end optical network terminal of protection relation links to each other with this equipment.
5. as claim 2 or 3 each described passive optical networks, it is characterized in that described backup link is an optical fiber link.
6. as claim 2 or 4 each described passive optical networks, it is characterized in that described backup link is an ethernet link.
7. a passive optical network service protecting method is characterized in that, comprises step:
A) determine optical network terminal protection group, described optical network terminal protection group comprises at least two optical network terminals, each optical network terminal all organize with protection that interior other optical network terminals link to each other by backup link and with its composition relation of giving mutual protection;
B) after optical line terminal detects the optical network terminal fault, to forming the optical network terminal transmission failure notification message that protection concerns with this optical network terminal that breaks down;
C) optical network terminal with the optical network terminal composition protection relation that breaks down receives described failure notification message, bears the business of the optical line terminal equipment that breaks down;
Wherein, optical line terminal adds the bandwidth parameter of distributing to the optical network terminal that breaks down with the optical network terminal that breaks down to be formed on the bandwidth parameter of optical network terminal of protection relation itself, makes the optical network terminal data that break down can not influence the business of forming the optical network device itself that protection concerns with the optical network terminal that breaks down forming forwarding on the optical network terminal of protection relation with the optical network terminal that breaks down; Perhaps, with the independent logical channel of giving on the EPON of optical network terminal distribution that breaks down of the optical network terminal of the optical network terminal composition protection relation that breaks down, and report optical line terminal, optical line terminal bandwidth parameter indirect assignment that the optical network terminal that breaks down is original is given the logical channel of this backup usefulness, makes the optical network terminal that breaks down and can not interact with data and bandwidth parameter that the optical network terminal that breaks down is formed the optical network terminal of protection relation;
8. passive optical network service protecting method as claimed in claim 7 is characterized in that step c) specifically comprises:
C1) optical network terminal with the optical network terminal composition protection relation that breaks down receives described failure notification message, judge whether also to receive the professional solicited message of transmitting of bearing that the Optical Network Terminal that breaks down sends, if, the optical network terminal that answer is broken down agrees to bear professional the forwarding, and execution in step c2), otherwise, execution in step c3);
C2) form the business that the optical network terminal of protecting relation is born the optical network terminal that breaks down with the optical network terminal that breaks down;
C3) optical network terminal with the optical network terminal composition protection relation that breaks down carries out failure diagnosis by backup link to the Optical Network Terminal that breaks down.
9. passive optical network service protecting method as claimed in claim 8 is characterized in that step c2) specifically comprise:
C21) form interface and the uplink service interface conducting that the optical network terminal of protection relation will be connected with backup link with the optical network terminal that breaks down;
C22) optical network terminal that breaks down receives the return information of protecting the optical network terminal of relation to send with this optical network terminal that breaks down composition, interface that will be connected with the customer service processing module and the interface conducting that is connected with backup link.
10. passive optical network service protecting method as claimed in claim 8; it is characterized in that; step c3) is meant and optical network terminal that the optical network terminal that breaks down is formed the protection relation detects the state of backup link; if state is normal; the fault of judging this optical network terminal is system's operation troubles; otherwise the fault of judging this optical network terminal is power down fault or backup link fault.
11. as each described passive optical network service protecting method of claim 7-10, its feature in, described backup link is optical fiber link or ethernet link.
Priority Applications (6)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100343100A CN1859811B (en) | 2006-03-15 | 2006-03-15 | Passive optical network system and its service protective method |
| US11/611,382 US7831145B2 (en) | 2006-03-15 | 2006-12-15 | Passive optical network system and method for protecting the services of the same |
| EP07005172A EP1835641B1 (en) | 2006-03-15 | 2007-03-13 | Passive optical network system and method for protecting the services of the same |
| PT07005172T PT1835641E (en) | 2006-03-15 | 2007-03-13 | Passive optical network system and method for protecting the services of the same |
| ES07005172T ES2381754T3 (en) | 2006-03-15 | 2007-03-13 | Passive optical network system and corresponding service protection method |
| AT07005172T ATE546954T1 (en) | 2006-03-15 | 2007-03-13 | PASSIVE OPTICAL NETWORK SYSTEM AND METHOD FOR PROTECTING ITS SERVICES |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2006100343100A CN1859811B (en) | 2006-03-15 | 2006-03-15 | Passive optical network system and its service protective method |
Related Child Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN200810185399XA Division CN101489155B (en) | 2006-03-15 | 2006-03-15 | Passive optical network system and service protection method thereof |
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| Publication Number | Publication Date |
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| CN1859811A CN1859811A (en) | 2006-11-08 |
| CN1859811B true CN1859811B (en) | 2011-02-02 |
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| CN2006100343100A Active CN1859811B (en) | 2006-03-15 | 2006-03-15 | Passive optical network system and its service protective method |
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| Country | Link |
|---|---|
| US (1) | US7831145B2 (en) |
| EP (1) | EP1835641B1 (en) |
| CN (1) | CN1859811B (en) |
| AT (1) | ATE546954T1 (en) |
| ES (1) | ES2381754T3 (en) |
| PT (1) | PT1835641E (en) |
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| US8582966B2 (en) * | 2007-09-10 | 2013-11-12 | Cortina Systems, Inc. | Method and apparatus for protection switching in passive optical network |
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| GB0720094D0 (en) * | 2007-10-15 | 2007-11-21 | British Telecomm | Optical network |
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Also Published As
| Publication number | Publication date |
|---|---|
| PT1835641E (en) | 2012-05-07 |
| EP1835641A1 (en) | 2007-09-19 |
| US20070217788A1 (en) | 2007-09-20 |
| CN1859811A (en) | 2006-11-08 |
| EP1835641B1 (en) | 2012-02-22 |
| ATE546954T1 (en) | 2012-03-15 |
| ES2381754T3 (en) | 2012-05-31 |
| US7831145B2 (en) | 2010-11-09 |
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